GreyZone, Battler wasn't "playing risky" on purpose. Erika tricked him into giving her those seals, and without those seals Battler's game would have been a lot more difficult for her. He ended up in the logic error because he got tricked into giving up the seals, and then was too vague when defining what they could do.

After all, Battler is incompetent. There's no way that he planned the logic error, considering the amount of genius required to fully anticipate Erika AND Bernkastel's actions.